Writing instrument



FIG. 1 is a front perspective view of a writing instrument showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view of my design as translucent;

FIG. 4 is a back side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view.

The inside features and writing tip in broken lines are included to show portions of the writing instrument that form no part of the claimed design. 

CLAIM The ornamental design for a writing instrument, as shown and described. 